Researchers, however, found that almost half said they would never accept such a proposal to have sex with a stranger.

The Durex British Sex survey found that almost 30 per cent of people “could be bought for sex” for £1 million while fewer than 15 per cent would engage in sexual intercourse for £100,000. Five per cent would participate for World Cup tickets.

It mirrors the plot from the 1993 Hollywood film Indecent Proposal, where a married woman, played by Demi Moore, agrees to have sex with a businessman, played by Robert Redford, for $1million.

Other findings from the online poll of 12,000 people found two in three people say they would never cheat on their partners despite high profile examples including John Terry being unfaithful to his wife Toni and Ashley Cole alleged to have cheated on his estranged wife Cheryl.

According to the poll the average Briton has sex three to four times a week and has slept with up to five different people.

The poll found that almost three in four couples talk about sexual fantasies with their partner, almost half role play, nearly a fifth wear their partner’s clothes while almost two in three admit to participating in either spanking or some kind of bondage-related sex.

Further findings included almost two thirds of those polled admitting to watching pornography, 15 per cent have had a threesome, more than five per cent admitted to have participated in group sex and three per cent engage in swinging practices.